Tool rest for grinding wheels



F. DUCKWITZ 2,415,676

TOOL REST FOR GRINDING WHEELS Feb; 11, 1947.

Filed Jan 1, 1944 INVENTOR. FRED DUCKWITZ. BY ,a/l-wgwsmgk Patented Feb.11, 1947 TOOL BEST FOR GRINDING WHEELS Fred Duckwitz, Kent, Ohio,assignor to The Black & Decker Electric Company Appiication January 1,1944, Serial No. 516,642

2 Claims.

This invention relates, as indicated, to tool rests for grinding wheels.

Tool rests of the aforesaid character have heretofore been available inwhich the tool or other supporting surface is imperforate, so that emeryand metal particles resulting from the grinding operations which impingeon such surface are deflected toward the operator and accumulate on theoperators person or over a large area in front of the grinding wheel.Such particles,

moreover, may cause injury to the operator, particularly if theparticles are still hot.

The present invention has as its primary object the provision of a toolrest which is especially adapted for use in connection with grindingwheels, and in the use of which, the deflection of hot particles in themanner described is, to a large extent, eliminated.

Another object of the invention is to provide a tool rest of thecharacter described which is designed to receive particles resultingfrom the grinding operations, and so dispose of such particles that theyare not injurious to the operator and do not accumulate over a largearea in front of the grinding wheel.

A further object of the invention is to provide a tool rest of thecharacter described which is characterized by a work-supporting surfacehaving openings which are sufficient in area and number to receive mostof the particles resulting from the grinding operations, and therebyprevent the deflection of such particles from said surface.

A still further object of the invention is to provide a tool rest of thecharacter described, which consists of a minimum number of easily madeparts and which is provided with novel means permitting the rest to bequickly attached to the frame or bench of a grinding wheel.

Other objects and advantages of the invention will be apparent duringthe course of the following description.

In the accompanying drawing, forming a part of this specification, andin which like numerals are employed to designate like parts throughoutthe same.

Fig. 1 is a top plan view of a tool rest made in accordance with theinvention, and showing the relationship thereof to a conventionalgrinding wheel;

Fig. 2 is a cross-sectional view, taken on the line 2--2 of Fig. 1, and

Fig. 3 is a side elevation of the tool rest.

Referring more particularly to the drawing, it will be seen that a toolrest constructed in accordance with the invention comprises a castinghaving an upper portion consisting of spaced side walls I and 2interconnected by a wall 3 which slopes inwardly as at 4 and 5.

Extending rearwardly and in slightly offset relation to the side wall 2is a bracket 6, which is preferably formed as an integral part of thetool rest and is slotted as at l for the reception of a screw, bolt orother fastening means whereby the tool rest may be attached to the frameor body of the machine, indicated at F, on which the grinding wheel G ismounted.

Secured to the upper edges of the walls I, 2 and 3 of the tool rest, asby means of stove bolts 8, is a U-shaped plate 9 having a multiplicityof slots or perforations Ill therein, which preferably extend in aseries of closely-spaced parallel rows transversely of the periphery ofthe grinding wheel, the plate 9 being disposed in a horizontal planewhich passes substantially through the aXis of the grinding wheel.

It will be noted that the arms of the U-shaped plate 9 are disposedalong the sides of the grinding wheel, thereby providing not onlyadditional supporting surfaces for tools to be ground, but

also permitting the portion of the plate 9 which has the slots I0therein to be brought as closely as possible to the periphery of thegrinding wheel.

In the us of the tool rest, the tool or other article to be ground issupported on the plate 9 and against the periphery or sides of thegrinding wheel. The emery and metal particles resulting from thegrinding operations which fly downwardly as indicated in Fig. 3 of thedrawing, will pass through the openings or slots Id and impinge upon thesurfaces ll and 5, eventually gravitating to the bench surfac or floor.This prevents the hot particles which would otherwise impinge on theplate 9 from bein deflected upwardly and laterally toward the operatorand possibly injuring him, and. also prevents such particles fromaccumulating on the tool rest or over a, large area, in front of thetool rest.

The openings or slots ID are preferably suflicient in area and number toreceive a large portion if not all of the particles resulting from thegrinding operations, and, if desired, the arms of the U-shaped plate 9may also be provided with slots or openings similar incharacter to theopenings I0.

departing from the spirit of my invention, or the scope of the subjoinedclaims.

Having thus described my invention, I claim:

1. A tool rest of the character described comprising a member havingspaced side walls and a front wall interconnecting said side walls, aU-shaped perforated plate secured to the upper edges of said walls, oneof said side walls hav ing a slotted-extension adapted for mounting saidtool rest in proximity to a grinding wheel.

2. In combination, a frame, a grinding wheel and a work supporting restdisposed closely adjacent the periphery of the wheel, said restcomprising a unitary removable unit including a horizontally disposedplate extending across said periphery and to points beyond both sides ofthe wheel, a flange on the forward edge of the plate and dependingtherefrom in spaced relation to said periphery and means for mountingthe rest on said frame adjacent the wheel, said 4 plate having aplurality of spaced openings therein covering the area opposite theperiphery and on. both sides of the wheel through which particlesresulting from the grinding operation are thrown, and the flangedeflecting said particles downwardly and rearwardly toward the grindingwheel.

FRED DUCKWITZ.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS Number Name Date 762,291 Doolittle June 14, 19041,047,571 Sadler Dec. 17, 1912 618,298 Ridley Jan. 24,1899 1,158,127Geiger Oct. 26, 1915

